This document discusses how to become a powerful speaker by avoiding negative behaviors and embracing honesty, authenticity, integrity, and love. It identifies seven "deadly sins" of speaking like gossiping, judging others, negativity, and complaining. It also outlines four "cornerstones" of powerful speaking: honesty, authenticity, integrity, and love. Additionally, it provides tools for a powerful voice like register, timbre, prosody, pace, pitch, and volume. The document is based on a TEDx talk and aims to teach how the human voice can change the world.